4
Configuring The Meter
24
4.5 PERFORMING THREE-POINT CALIBRATION (“CAL.3”)
Only buffer solutions of 4, 7 and 10 are acceptable. IF the buffer value is not
accepted, the meter will display a flashing “
PH.ER
“.
1.
Place your electrode into the pH buffer solution.
2.
Press the
MENU
button until the meter shows “
CAL.3
”
3.
Press the
T/mV
button. The meter shows “
IN 1
” (Input 1)
4.
Press the
T/mV
button again. The meter shows the previous value of “
IN 1
”.
5.
Press the
T/mV
button again. The meter shows the actual buffer solution’s pH
value.
Please allow enough time for the electrode to settle before processing.
6.
Press the
MENU
button to store the “
IN 1
” value. The meter momentarily shows
an “
OK.4
”, followed by “
IN 2
” (Input 2)
7.
Rinse the electrode with distilled water and place it into the pH 7 buffer solution.
8.
Press the
T/mV
button. The meter shows the previous value of “
IN 2
”
9.
Press the
T/mV
button again. The meter shows the actual buffer solution’s pH
value.
Please allow enough time for the electrode to settle before processing.
10.
Press the
MENU
button to store the “
IN 2
” value. The meter momentarily shows
an “
OK.7
”, followed by “
IN 3
” (Input 3)
11.
Rinse the electrode with distilled water and place it into the pH 10 buffer solution.
12.
Press the
T/mV
button. The meter shows the previous value of “
IN 3
”
13.
Press the
T/mV
button again. The meter shows the actual buffer solution’s pH
value.
Please allow enough time for the electrode to settle before processing.
14.
Press the
MENU
button to store the “
IN 3
” value. The meter momentarily shows
an “
OK.10
”, then momentarily shows “
STRD
”, followed by “
S1.CF
” (Setpoint 1
Configuration).
